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|Name:||Named after Elysairo Tavora (b. 1911), professor of mineralogy, University of Brazil, Rio de Janeiro.|
Visit gemdat.org for gemological information about Tavorite. Currently in public beta-test.
Classification of Tavorite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||7/B.02-60|
|Nickel-Strunz 10th (pending) edition ID:||8.BB.05|
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
|Dana 8th edition ID:||188.8.131.52|
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
|Hey's CIM Ref.:||19.1.14|
19 : Phosphates
1 : Phosphates of the alkali metals
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Type Occurrence of Tavorite
|Type Locality:||Sapucaia Mine (Proberil mine), Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Brazil|
|Year of Discovery:||1955|
Physical Properties of Tavorite
Crystallography of Tavorite
Optical Data of Tavorite
|RI values:||nα = 1.795 nβ = 1.810 nγ = 1.835|
|2V:||Measured: 74° , Calculated: 78°|
|Maximum Birefringence:||δ = 0.040|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Surface Relief:||Very High|
|Dispersion:||r << v|
Chemical Properties of Tavorite
|Essential elements:||Fe, H, Li, O, P|
|All elements listed in formula:||Fe, H, Li, O, P|
Relationship of Tavorite to other Species
|Member of:||Amblygonite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Tavorite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Tavorite
Science (1954), 119, 739
Lindberg, M.L. and Pecora, W.T. (1955) Tavorite and barbosalite, two new phosphate minerals from Minas Gerais, Brazil. American Mineralogist: 40: 952-966.
American Mineralogist: 1977): 62: 559.
Soviet Physics – Crystallography: 29: 27-30.
Internet Links for Tavorite
Localities for Tavorite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Line pit (Lowe's Mine), State Line District, Cecil Co., Maryland, USAFrom Bill Cordua, 9th Dec 2013 21:28:40